Interesting reading everyone's experiences. I've not had trouble with my cooling system (so far luckily) but I read an article when researching fitting the 82° thermostat (which I'm planning on installing) which covered air flow.
Do you guys have this air dam fitted still?
mine is broken along the bottom where the three bolts are but stays in place.
Also the foam along the top of the radiator?
again mine is partially in place but coming away on the left had side of the photo.
Both those elements assist moving the air though the radiator.
Also mentioned in the article is checking you have a 1.1 bar rated radiator cap, not a 0.9 bar, as that’s the pressure it will allow before it vents to your overflow – a touch more pressure in a 1.1 bar cap will stop it venting (and boiling) sooner..

Here is the article; https://www.unsealed4x4.com.au/break...ing-tech-tips/